Pill MedicineOne way anti-psychiatry groups trivialize psychosis and marginalize psychiatry is by emphasizing the adverse effects of antipsychotic medications while denying or minimizing their benefits.1

To be sure, the well-recognized metabolic, neurological and cardiovascular risks associated with many antipsychotic medications must be taken very seriously.

Moreover, antipsychotics (APs) are often used when they are not needed; eg, for the treatment of anxiety disorders2; for “agitation” in nursing home patients; and for “acting out” in adolescent populations. (I spent many years as a psychopharmacology consultant trying to get doctors to reduce their over-reliance on antipsychotics.)

On the other hand, there is convincing evidence that in patients with chronic schizophrenia, APs play a crucial role in maintaining remission, averting relapse, improving quality of life, and—importantly—reducing overall mortality.3-5  

But even many psychiatrists may not realize that APs reduce the risk of suicide in patients with schizophrenia.

To back up a bit: an estimated 20% to 40% of those with schizophrenia attempt6—and 5% complete—suicide7—a risk at least 10 times that of the general public. Suicides are concentrated early in the illness course and are associated with a number of risk factors, ie:

“Risk factors with a strong association with later suicide included being young, male, and with a high level of education. Illness-related risk factors were important predictors, with number of prior suicide attempts, depressive symptoms, active hallucinations and delusions, and the presence of insight all having a strong evidential basis. A family history of suicide and co-morbid substance misuse were also positively associated with later suicide. The only consistent protective factor for suicide was delivery of and adherence to effective treatment.”8 [italics added].

This last point, of course, is crucial. Indeed, the authors, Hor and Taylor, add that,

“…efforts at prevention should. . .focus on optimizing adherence to medication, and possible earlier use of clozapine, as the only antipsychotic medication with demonstrated efficacy. . .  for the management of suicidality in schizophrenia.”8

Clozapine

Indeed, the first FDA-approved medication with an anti-suicide indication was clozapine for schizophrenia. The regulatory approval in 2003 was largely based on the International Suicide Prevention Trial (InterSePT), a randomized trial that compared clozapine with olanzapine in patients with schizophrenia and schizoaffective disorder who were at high risk for suicide. 9

Suicidal behavior (measured by suicide attempts, hospitalizations, and rescue interventions) was significantly decreased in patients treated with clozapine, which is associated with a substantially lower risk of suicide than any other antipsychotic.10

But while clozapine provides the best evidence of anti-suicidal properties in schizophrenia, there is accumulating evidence that antipsychotic medication in general is associated with decreased risk of suicide in this population.

For example, Tiihonen and colleagues11 performed an observational study of antipsychotic treatment in patients with schizophrenia and schizoaffective disorder (N= 2230, average length of follow-up =3.6 years). Excess mortality was seen mostly in patients not taking antipsychotic drugs, for whom the risk of suicide was high. There were 26 suicides in patients not taking antipsychotics compared with 1 in patients taking medication (adjusted relative risk 37.4).11

Consistent with these data, Herings and Erkins12 studied drug refill patterns in patients believed to have schizophrenia. They found a 4-fold increased risk for attempting suicide among patients who interrupted their use of olanzapine or risperidone for at least 30 days.

Recently, Tiihonen and associates13 carried out a large observational study (N=21,492) of patients with schizophrenia. The study found that antipsychotic use was associated with substantially lower overall mortality and very significantly reduced rates of completed suicide across the entire dosage range (low to moderate to high) when compared with no antipsychotic drug use (10% of the entire sample). Maximum anti-suicide benefit was seen with the higher antipsychotic doses.

Analysis of this study by Dr Bernard Carroll shows that for the group with no antipsychotic exposure, the suicide rate was 183 per 100,000 person years. In the medium-plus-high dosage AP groups, the combined rate fell to 129 suicides per 100,000 person years—roughly a 30% reduction from the no-medication group (B. Carroll MD, personal communication, 3/27/16).

Moreover, if we make the reasonable assumption that patients receiving the highest doses of AP were probably the most severely impaired—and thus, at highest risk for suicide—these findings are all the more impressive.

Of course, in non-randomized, observational studies, there is always the potential for “selection bias” and/or “reversed causality.” For example, it is possible that patients who become suicidal—for whatever reason—stop taking their antipsychotic, rather than becoming suicidal because they stopped the medication. However, the apparent dose-response seen in the Tiihonen et al data—ie, suicide rates declined as medication dose increased—plausibly suggests that medication was actually bringing down suicide rates.14

Multi-modal treatment

It would be incorrect to infer from this brief review that the optimal treatment of schizophrenia is simply a matter of giving patients antipsychotic medication.

Persons with schizophrenia have lives beyond their symptoms. They often require and benefit from a range of adjunctive psychosocial services, including assertive community treatment, supported employment, cognitive behavioral therapy, family-based services, skills training, psychosocial interventions for alcohol and substance use disorders, and psychosocial interventions for weight management.15

But there is little question that, for patients suffering the chronic, debilitating symptoms of schizophrenia, antipsychotic medication is a critical component of treatment—and may literally be life-saving.


 

This article originally appeared in:

Psychiatric Times

It is reprinted here with permission.